Anybody have model# for 12v optima yellowtop Bat. for 2012 pip?

If so, welcome to the club.

 

Sorry,
Yes, I was referring to Todd's experiment but I could not remember whether he put the cells in a Gen 3 or Gen 2.
There is a recent posting where Toyota says the Gen 4 uses a different Nickel alloy to improve energy density in Gen 4. I hope it improves battery life too. I know we are only referring to Trim One & Two. The others have a totally different battery chemistry.

 

I remember now. I just found it again. It was a Gen 2. Gen 4 cells in a Gen 2 | PriusChat
But, as we so often do, we digress.

 

Here is the quote about Gen 4 battery improvement:

Newly developed high performance and nickel-metal hydride batteries (which use Hyper prime Nickel) have both been adopted in this generation. These batteries are smaller and lighter that (sic) before, enabling installation under the rear seats.

From
differences between gen3 and gen4 hybrid battery modules | PriusChat